Answer:
Option C )The number of atoms of each element is the same on each side of the equation.
Answer:
Mole of the H2O = 4.5
Number of molecules =4.5 multipled by avogadro's number.
The number of protons found in the nucleus equals the number of electrons that surround it, giving the atom a neutral charge (neutrons have zero charge). Most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen.Hoped this helped